= 4 or one tab is code return ($l = $line[0]) === ' ' && $line[1] === ' ' && $line[2] === ' ' && $line[3] === ' ' || $l === "\t"; } /** * Consume lines for a code block element */ protected function consumeCode($lines, $current) { // consume until newline $content = []; for ($i = $current, $count = count($lines); $i < $count; $i++) { $line = $lines[$i]; // a line is considered to belong to this code block as long as it is intended by 4 spaces or a tab if (isset($line[0]) && ($line[0] === "\t" || strncmp($lines[$i], ' ', 4) === 0)) { $line = $line[0] === "\t" ? substr($line, 1) : substr($line, 4); $content[] = $line; // but also if it is empty and the next line is intended by 4 spaces or a tab } elseif ((empty($line) || rtrim($line) === '') && isset($lines[$i + 1][0]) && ($lines[$i + 1][0] === "\t" || strncmp($lines[$i + 1], ' ', 4) === 0)) { if (!empty($line)) { $line = $line[0] === "\t" ? substr($line, 1) : substr($line, 4); } $content[] = $line; } else { break; } } $block = [ 'code', 'content' => implode("\n", $content), ]; return [$block, --$i]; } /** * Renders a code block */ protected function renderCode($block) { $class = isset($block['language']) ? ' class="language-' . $block['language'] . '"' : ''; return "

" . htmlspecialchars($block['content'] . "\n", ENT_NOQUOTES | ENT_SUBSTITUTE, 'UTF-8') . "

\n"; } }